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L. Kathrein, K. Meixner, D. Winkler, A. Lüder, S. Biffl:
"A Meta-Model for Representing Consistency as Extension to the Formal Process Description";
Vortrag: 24th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2019), Zaragoza, Spain; 10.09.2019 - 13.09.2019; in: "Proceedings of the 24th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2019)", IEEE, (2019), ISBN: 978-1-7281-0304-4; S. 1653 - 1656.

In discrete manufacturing, basic and detail engineering workgroups need to collaborate to design highly automated cyber-physical production systems. Product/ion-awareness
describes views and requirements coming from product and
production process design, which are relevant to engineer production resources. These requirements imply strong dependencies
between the product, the production process, and production
resources (PPR). The Formal Process Description (FPD) provides
basic concepts for modeling PPR knowledge, which support discrete manufacturing to some extent. In this paper, we introduce
a meta-model that describes the structure of the FPD including
a set of proposed extensions, focusing on expressing consistency
dependencies on PPR relations, as a foundation for making design
decisions traceable in the engineering process. In addition, the
meta-model provides a clear description of how to model parallel
or alternative process flows, a common use case in discrete
manufacturing. The meta-model provides stakeholders with a
clear description of the PPR modeling language (PPR-ML) and
a rule set to check the validity of a model

Formal Process Description (VDI/VDE 3682), Product-Process-Resource Modeling, Meta-Model